/***
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2011 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.objectweb.asm.tree;

import java.util.ArrayList;
import java.util.List;

import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.ModuleVisitor;
import org.objectweb.asm.Opcodes;

/**
 * A node that represents a module declaration.
 * 
 * @author Remi Forax
 */
public class ModuleNode extends ModuleVisitor {
  /**
   * Module name
   */
  public String name;

  /**
   * Module access flags, among {@code ACC_OPEN}, {@code ACC_SYNTHETIC} and
   * {@code ACC_MANDATED}.
   */
  public int access;

  /**
   * Version of the module. May be <tt>null</tt>.
   */
  public String version;

  /**
   * Name of the main class in internal form May be <tt>null</tt>.
   */
  public String mainClass;

  /**
   * A list of packages that are declared by the current module. May be
   * <tt>null</tt>.
   */
  public List<String> packages;

  /**
   * A list of modules can are required by the current module. May be
   * <tt>null</tt>.
   */
  public List<ModuleRequireNode> requires;

  /**
   * A list of packages that are exported by the current module. May be
   * <tt>null</tt>.
   */
  public List<ModuleExportNode> exports;

  /**
   * A list of packages that are opened by the current module. May be
   * <tt>null</tt>.
   */
  public List<ModuleOpenNode> opens;

  /**
   * A list of classes in their internal forms that are used as a service by the
   * current module. May be <tt>null</tt>.
   */
  public List<String> uses;

  /**
   * A list of services along with their implementations provided by the current
   * module. May be <tt>null</tt>.
   */
  public List<ModuleProvideNode> provides;

  public ModuleNode(final String name, final int access, final String version) {
    super(Opcodes.ASM6);
    this.name = name;
    this.access = access;
    this.version = version;
  }

  public ModuleNode(final int api, final String name, final int access, final String version, final List<ModuleRequireNode> requires,
      final List<ModuleExportNode> exports, final List<ModuleOpenNode> opens, final List<String> uses, final List<ModuleProvideNode> provides) {
    super(api);
    this.name = name;
    this.access = access;
    this.version = version;
    this.requires = requires;
    this.exports = exports;
    this.opens = opens;
    this.uses = uses;
    this.provides = provides;
    if (getClass() != ModuleNode.class) {
      throw new IllegalStateException();
    }
  }

  @Override
  public void visitMainClass(String mainClass) {
    this.mainClass = mainClass;
  }

  @Override
  public void visitPackage(String packaze) {
    if (packages == null) {
      packages = new ArrayList<String>(5);
    }
    packages.add(packaze);
  }

  @Override
  public void visitRequire(String module, int access, String version) {
    if (requires == null) {
      requires = new ArrayList<ModuleRequireNode>(5);
    }
    requires.add(new ModuleRequireNode(module, access, version));
  }

  @Override
  public void visitExport(String packaze, int access, String... modules) {
    if (exports == null) {
      exports = new ArrayList<ModuleExportNode>(5);
    }
    List<String> moduleList = null;
    if (modules != null) {
      moduleList = new ArrayList<String>(modules.length);
      for (int i = 0; i < modules.length; i++) {
        moduleList.add(modules[i]);
      }
    }
    exports.add(new ModuleExportNode(packaze, access, moduleList));
  }

  @Override
  public void visitOpen(String packaze, int access, String... modules) {
    if (opens == null) {
      opens = new ArrayList<ModuleOpenNode>(5);
    }
    List<String> moduleList = null;
    if (modules != null) {
      moduleList = new ArrayList<String>(modules.length);
      for (int i = 0; i < modules.length; i++) {
        moduleList.add(modules[i]);
      }
    }
    opens.add(new ModuleOpenNode(packaze, access, moduleList));
  }

  @Override
  public void visitUse(String service) {
    if (uses == null) {
      uses = new ArrayList<String>(5);
    }
    uses.add(service);
  }

  @Override
  public void visitProvide(String service, String... providers) {
    if (provides == null) {
      provides = new ArrayList<ModuleProvideNode>(5);
    }
    ArrayList<String> providerList = new ArrayList<String>(providers.length);
    for (int i = 0; i < providers.length; i++) {
      providerList.add(providers[i]);
    }
    provides.add(new ModuleProvideNode(service, providerList));
  }

  @Override
  public void visitEnd() {
  }

  public void accept(final ClassVisitor cv) {
    ModuleVisitor mv = cv.visitModule(name, access, version);
    if (mv == null) {
      return;
    }
    if (mainClass != null) {
      mv.visitMainClass(mainClass);
    }
    if (packages != null) {
      for (int i = 0; i < packages.size(); i++) {
        mv.visitPackage(packages.get(i));
      }
    }

    if (requires != null) {
      for (int i = 0; i < requires.size(); i++) {
        requires.get(i).accept(mv);
      }
    }
    if (exports != null) {
      for (int i = 0; i < exports.size(); i++) {
        exports.get(i).accept(mv);
      }
    }
    if (opens != null) {
      for (int i = 0; i < opens.size(); i++) {
        opens.get(i).accept(mv);
      }
    }
    if (uses != null) {
      for (int i = 0; i < uses.size(); i++) {
        mv.visitUse(uses.get(i));
      }
    }
    if (provides != null) {
      for (int i = 0; i < provides.size(); i++) {
        provides.get(i).accept(mv);
      }
    }
  }
}
